A cobpokatioil of oiiio



Dec. 22, 1931. c. HERWIG, JR

HERMETICALLY SEALED AIR MIXER Filed June 30, 1930 A TTORNEY fle.

Patented Dec. 22, 1931 UNITED STATES s CONRAD HER'WIG, naar PIQUA,` oHIo, Assr'eNoR To 'rien rAvoriirnsrovE AND.;v I El@ Y RANGE COMPANY, or rrenA, omo, A conron'ATroN, or eine 'f f PATENT HERMETIQALLYVSEALEDAIR Mixen,

Application filed Y une v30,

,This invention relates .toimprovements in devices for regulating the admission ofair to gas burners used in connection with cooking rangesand other-cooking andheating stoves in which V burners are used. Y

' It is particularly'the object of this'f-inven- .tion toV providepmeans orregulating the amount of air admitted .to the mixing cham" ber so that as vthe amountfot1 gas is regulated `1n the amount of air may be likewise regulated.

` It' is also Van object of this inventionto y provide, in connection with-meansA for reg vulatingthe admission of air,` means to form a hermetically sealed connection between the lligas inlet stem and the means for regulating the flow of gas and air. While-in the present instancethis hermetical sealingmeans Aconsistsof anasbestos gasketother suitable and etfective material may beV used instead ct asbestos., l l y These and other'advantages will appear from the description taken lin connection with the drawings. .i Referring to thedrawings: ,A

'25 Figure 1 is a side elevation of the outer end of a burner, stem showing the regulating.

means attached thereto. y y

Figure 2 lis a section on the Vline 2-7-2 of Figure 3. z

Figure?) is an endV elevation of thejV air regulator attached to the stem, and showing the air openings open.

Figure 4 is a view similar to the air openings closed.

Figure 5 is a section onl Figure 4. Figure 6 is an Figure 3 with the une 543er end elevation of the regulating means showing the gas inlet bushing.`

Figure 7 is a section similar to Figure l2 but with the bushing added thereto.V

Figure 8 is-a section through the air regulating' 'means showing two concave discs with the'space between the discs exaggerated, and the bushing that holds Vthe `discs together in position for being clamped to one of the discs after the discs havebeen pressed together to some extent. Y `Figure 9is a view similar to Figure 6, butk showing a larger number of .air-inlet open# 1930. Serial No. 464,759. l

ings. Inrthis form theseopenings f Figure -10is2 a View;similartoFigure, butfshowing the aircontrolfmeans `in.anpo 'sitionto shutoffthe air. y ,n ,j f5

The numeral 1 is used to .indicate` a vertical sternl used for the admissionzof air- ,and-` gas p ,tostoves, ovens and other apparatus inwhich g gasV may be,4 burned. .The outer endoff'this stem'is bellfshaped, as indicated by the nu'- E60 meralg2, andhas on the outer-.end thereof an annular periphery 3.v Around this annular Vperiphery is an annular gasket 4. u Thisgasy ket may be madejof any suitable materialbut `preferably of asbestos. n f 1 L ,F65 Y Fitting over this annular gasket, as shown in Figure 2, is a disc 5) whichhas therein a central-opening 6 Aforthe admission of` gas into the stem. Around thecentral opening,

is arranged aV plurality of airinlet passages fo As shown in'Figures u3 and 6, there-are twoof these air passageways. NThe number may be varied. VVln Figures 9 and 10 fourare shown. 1 Adjacent theperiphery ofthedi'sc and opening into one of the air passageways i5 is a slot 8 to'accommodate ascrew. Extend ing upwardly.` from the outer peripherylvof the disc 5 is a tongue 9. .p -Fitting over the disc fpositione'd upon the annular gasket L is a cap-shaped memben be- 'Sgok ing formed of a disclO and a peripheralmarginal flange 11. On this marginal flange is aV pluralityof prongs 12 adaptedto be bent in andattached tothe outer peripheryV of the endofv the stem by means of screws 13. `This, g5 form of attachment for the capis shown in Figures 2 and 7.1 1` Extending through the disc 10 and into a lug 15 on the inner edge of the annular periphery is a screw 14. This screw serves to hold the discs inplaceupon the outer T190 end of the stemand in this manner assists'the screws 13. This screw is not suiiiciently forced in to prevent the turning of the disc 5 I so that the air passagewaysmay be closed. .Y For the n purpose of accommodating the 95 tongue 9 the outer periphery of. thediscfl() has a slot 16 therein.V Y, This disc 10 also yhas a central opening 17 lin line :with `the' central lopening 6 of the discA 5. Thisopening may' f be of the same size as the opening 6 or it may t100 shown.: I. Y i

5 air passageways 18 adapted to register withy the airpassageways 7 in the disc '5. In Figure 3 these-passageways are shown in register with-each other, Whereas in Figure 4 they are v a burnervstem having an opening, a. closure for said opening.consisting'ofconcaved discs 75 shown outof register and with Vthe passageway ineachfdiscclosed by the other disc so that no air can pass into thel stem. c

It is also observed that thediscs are concave in shape with their concave faces abutting each other so that the central parts of the discs 'areslightly removed. f It is therefore appar-` entthat in'r'otatingthe inner Vdisc,ras shown i kin Figure 2, onlythe edges oithediscs contact', the other parts of the discs being out of contactandffree from wear. In order tofhold the central parts of these `two discs in adjusted spacedV relationl to'. each other therefmay be 'provided a bushing` 19. ,Each end of athis bushing is turned over to engage the --outside 'surface'oftheadjacentdisc One endv of the inthe disc 10. This reduced part ofthe bushing provides a shoulder 2l. The space between the shoulder 21 and the yturned end engaging ness of theidisc 10 so that there is maintained vbetween-the discs a'slivht space, as shown in VFigure 7.y When the discs are npositioned as shown in'Figu're 7` they are held in'thatl position. Figure 8 shows .the discs, before the Vbushing is` applied. However, the Vspace between tlie discs is exaggerated inl -order to bring out more clearly the concave shape of the two discs.

rotating disc is on the outside of' the disc that forms part of the cap. In this form the bushconnection Vwith `the arrangementshown in VFigure 2.V The turned-over ends of the bushing are indicated by the numeral 22.' In the form shown inl Figure? the outer periphery of the cap has a bead 28. Inthis form the disc is pressed inward rather than outward, as shown in Figure 2. ThisY arrangement is merely for the purpose of adjustingthe different relations of the two discs. Inone the movable disc is onthe inside of the cap, whereas in the other the movable disc is on the outside ofthel cap.V V

4 The purpose oftheasbestos gasket is to 'Y provide'a tight sealing it between the outer end of theburner stem and the cap. While this gasket is here described as being made of s Vasbestosfany-other suitablefmaterial may be used provided that it forms an air-tight fit and is not subj ect to be destroyed by'combus- ,65 tion. 'l Y Y bushing is reduced at 20 to engage the smaller opening in the disc, whiley the other part of the s bushin is larger to engage the larger opening the cap member and engaging theouter edges Y of the rotatable disc. 'the disc 10 is slightly longer than thethick- In the forms 'shown in Figures r7 and 8 the- 'll-he'same bushing, however, may be used in Y openings` a gasket between the rotatable disc I desire to comprehend.l within my inven tion such modifications as may be clearly em braced within my` claims andthe scope of my invention.

Having thus fully described my invention,

what I claim is new and desire to secure by Letters Patent, is:

Vl. In an air regulator, in combination' with arranged with their concaved'faces opposite Veach other-,and a heat resisting gasket between one of the discs and the stem. Y n y 2. Injan ai r ;11egulator, in combination with a burner stem havingl an opening, a closure for said opening consisting of concaveddiscs arrangedV with their 'concaved faces-opposite Y -each other, :and an asbestos gasket between said discs land the stem. 'l

8. Inan lair regulator, afcap member con- .185

fsistingof a lconc'aved" 'disc' land azperipheral flange, a rotatablediscffittingfwithinthe cap member and contactingV with .only Athe outer edges lofthe concave facev of the concave'disc, each disc having an airpopening adaptedin one position to register withthe opening in the ,other and'in anotherposition to be closed by the-'other fdisc, and an asbestos'gasket in 4L In an air regulator, al cap member consisting'of a disc having fa peripheral flange la central gas holeand an air opening, and an n asbestos gasketwithin the capy member and engaging the vouter. edgesl ofthe rotatable 5L In an air regulator, inA combination with a hollow stem, a cap adapted to fit over` the end 'of said stem, saj'id cap consisting of a'disc having a peripheral Harige enga-ging the end oiv the stem; a rotatable concave disc betweeny thecap and said end having its-,concave face adjacent the cap` each of said discs 'having a central. ,opening and a plurality of other and the end of the stem, and means to rotate the rotatable disc to vary the relative'positions of the pluralityofopenings. l

6. In an air regulator, in combination with a burner stem having an Opening, a'cap memno ber engaging said stem andformin'g part of V a closure for saidopening, a concave disc cooperating with said cap member and Vforming another part of the closure for said opening, andan asbestos gasketbetween the cap meme ber and thestem. f Y

c l 7.V In an air regulator, in combination with a burner stem having an opening, a cap member engaging said .stem over the opening, said cap member consisting of a concaved 

